Bandiwidth limitation of a Reflector antenna (primaty vs. secondary)

Hi,

I have a question regarding the Bandwidth limitation of reflector antennas. I want to design a reflector antenna from 2 to 5 GHz which is quite wide bandwidth. I think the dish can be designed for such a bandwidth, but can I also design a normal feed? Which type of reflector antenna is better to be used primary of secondary focus?

Regards
Hadi